Sewing-machine-attachment holder



(No Model.) I

T E. SEITZ.

SEWING MACHINE ATTACHMENT HOLDER. 1 No. 400,257. Patented Mar; 26, 1889.

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N. PETERS Photo-Lithographer, Washington, D. a

NITED STATES PATENT ()FFICE.

EDIVARD SEITZ, OF PEORIA, ILLINOIS.

SEWING-MACHIN E-ATTACHM ENT HOLDER.

SPECIFICATION forming part of Letters Patent No. 400,257, dated March 26, 1889.

Application filed March 24, 1888. Serial No. 268,443. (No model.)

To all whom it may concern:

Be it known that I, EDWARD SEITZ, a resident of Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Presser-Bar-Attachment Holders for Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The invention is shown in the accompanying drawings, wherein Figure l is a perspective view of the attachment-shank and the securing device, the presser-bar in which the securing device is mounted appearing only in dotted lines. Fig. 2 is a vertical longitudinal section through the shank with all parts in full lines.

In these figures, S is a detachable portion of the ordinary presser-bar, and corresponds to the upper part of the angle-piece called the foot in the earlier constructions.

M is the bod yof a detachable foot, hemm er, rufller, or the like, having a preferably noncylindrical shank, O, sliding into a correspondingly-formed recess in the lower part of the bar S. The shank C is transversely grooved at N upon its upper surface, in order that it may be engaged and drawn backward by the middle portion of a bent rock-shaft, K, revolubly mounted in the bar S and actuated by a lever, a. The bar S is internally recessed, to allow the partial rotation of the rock-shaft K, and the latter is so placed that, in rotating, its middle portion passes bodily into and out of the path of the shank, the end portions about whose axial line the middle portion ro-- tates being above the plane of the shank. The lever a is preferably so placed that when thrown back its weight tends to keep the rock-shaft above the path of the shank. Now, when the shank is inserted in its recess and carried back nearly into position the raising of the lever a swings the rock-shaft into the groove N, and, if the rotation be continued, presses it against the rear wall of the groove, forcing it backward and drawing the body M firmly against the presser-bar S, and securing it in such'manner that the working of the machine has little tendency to loosen it.

It is of great importance that there should be the most rigid union of the presser-bar and attachment, and that accidental loosening should be prevented. A slightly-tapered shank fitting a corresponding aperture in the presser-bar is peculiarly adapted to secure th'ese results, but unless fitted with the greatest care and at some expense it cannot be inserted an d removed conveniently by ordinary means. Now, this device not only looks the shank when in place, but seizes it and draws it into position, and by a reverse motion of the lever forces it out of position so far as to completely loosen it, if it be properly made; and this is accomplished without any bending-strain upon the presser-bar, for as the rock-shaft offset presses upon one or the other wall of the groove in the shank, forcing it inward or outward, the axial portion of the shaft reacts with the same force upon the presser-bar and exactly balances the strain of insertion or withdrawal.

hat I claim is The combination, with the presser-bar, having a transverse recess in its lower end, of a sewing-machine attachment provided with a transversely-grooved shank fitting said recess and a lever-actuated rock-shaft. mounted in said presser-bar above and transverse. to said shank and provided with a bend or offset greater-than the shafts distance above the shank, whereby rocking of the shaft may throw the offset into the shanks groove and draw the shank into or force it out,of posi- EDWARD SEITZ.

Witnesses:

JOHN J. WoMBAcHnR, MINNIE M. GEBHARDT. 

